Steam-boiler.



PATENTED MAY 22, 1906.

G. H. BARRUS.

STEAM BOILER.

APPLICATION FILED AUG. 21,1905.

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PATENTED MAY 22, 1906.

G. H. BARRUS. STEAM BOILER.

APPLICATION FILED AUG. 21, 1905.

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G. H. BARRUS. STEAM BOILER.

APPLIOATIOH FILED AUG 21, 1905.

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STEAM-BOILER.

Specification of 'Letters Patent.

meme May 22, 1906.

Application filed August 21 1905. Serial No. 274,973.

To @ZZ whom it may concern:

Be it known that I, GEORGE H. BARRUS, of Brookline, Norfolk county, Massachusetts, have invented a new and useful Steam- Boiler, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.-

The object of my invention is to provide a settling-chamber in so-called horizontal water-tube boilers, through which the water circulates at such a reduced velocity that all impurities suspended in the Water will settle and collect therein and from which they can be drained by blow-off pipes, thereby preventing theirdeposit as scale on the heatingsurfaces of the boiler. The object is the same as that sought in my previous inventions, for which United StatesLetters Patent were granted me, numbered 765,062 and 780,473, and dated, respectively, July 12, 1904, and January 17, 1905 but in the present arrangement the means employed secures a more compact boiler, and the invention is one which can be adapted with little expense to boilers already in service.

A further object is to so arrange the settling-chamber that there Will be less strain upon it and upon the connected circulatingpipes than has heretofore been the case.

In the accom I anying drawings, Figure 1 shows in vertica section a steam-boiler constructed in accordance with my invention. Fig. 2is a rear elevation showing the boilersetting in vertical section on the line 11 II of Fig. 1 and Fig. 3 is a cross-section of the settling-drum, showing the interior construction and o eration.

In file drawings, 2 2 represent two horizontal steam and water drums; 3, a bank of parallel inclined tubes arranged below the drums 2, connected into headers 4 and 5 at the front and rear ends;

6 represents a row of short nipples connecting the front headers 4 with the front end of the drums 2, and 7 represents a row of tubes, called circulating-tubes, connecting the rear headers 5 with the rear end of the drums 2 through the settling-drum 8. The settlingdrum 8 is a transverse cylindrical shell pref erably lying diametrically in the plane of the circulating-tubes 7 and connected thereto at top and bottom, as shown. The settlingdrum 8 contains a removable defiecting-plate 10, connected with the interior of the drum, preferably by an angle-iron 9, and forming a transverse partition at the top, and it also contains a curved deflecting-plate 12, attached to the side of the shell and preferably a removable curved plate 13, covering the opening between the late 12 and a partition or angle-iron 13. T 1e plate 12, the removable cover 13, and the angle-iron 11 together form a transverse partition at the bottom, leaving a large compartment or settlingchamber proper in the middle of the drum. The upper plate 1.0 and the cover 13 are preferably made removable to provide access to the ends of the tubes entering and leaving the settling-drum, both for introducing the said tubes and for the use of an expanding-tool forrolling the ends of the tubes during the recess of erection. and whenever the tubesave to be renewed or repaired. The upper plate 10 forms a assage-way so arranged that water flowing from the upper part of the circulating-tubes into the settling-drum is deflected from a diametrical course across the drum to the direction shown by the arrows.

Since the cross-section of the settling-chamber is greater than the passage through which the water flows in any other p art of the boiler, its velocity becomes greatly reduced, and any suspended impurities are given time to settle out into the lower part of the chamber. The water in passing out of the settling-chamber is obliged to take an upward course over the top of the curved plate 12, rising somewhat above the center of the drum, and thereby nearly the whole of the interior space 0011- tained in the shell is rendered effective for settling. The feed-water is preferably supplied to the boiler through pipes 14, attached to the front end of the steam and water-drum, so as to be heated approximately to the steam temperature by the lower surfaces of these drums and by mixture with. the boiling water alreadyin circulation as it asses along to the rear. forming impurities previously in solution become insoluble and separate from the water before it descends into the settling-drum. As the settling-drum is the sole connection between the steam and water drums and the rear headers and the whole body of water in circulation must pass throughit before reaching the hot tubes which form the main heating-surfaces of the boiler, there is ample opportunity for the removal of all impurities held in suspension, which would otherwise be deposited in the boiler in the form of scale.

Being thus heate the scale- TOO The settling-drum thereby prevents serious.

incrustation, rendering frequent cleaning unnecessary and increasing the efliciency and durability of the boiler.

15 is a blow-off pipe through which the settling-drum is emptied of sediment.

Although the drawings show two steam and water drums, there may be but a single drum or a greater number than shown, depending on the number of headers and size of the boiler.

I do not limit myself to the exact arrangement of angle-irons and plates shown within the settling-drum nor the exact location and arrangement of the drum itself, provided it is so planned as to secure a settling-space wherein the velocity of the water in circula tion is sufliciently reduced to enable suspended matter to settle.

A further advantage is produced by the location of the settling-drum in the plane of the circulating-tubes, as shown. It serves to reduce the area of the opening for the es cape of the products of combustion out of the boiler, which opening with the ordinary arrangement is too large, and thereby to compel them to spread sidewise over the whole number of tubes, where otherwise they take a short course over only the central tubes.

1 claim- 1. A water-tube boiler, having a bank of parallel inclined tubes, one or more steam and water drums above the tubes, headers connecting the tubes at the front and rear ends and themselves connected by circulating-tubes with the steam and water drum or drums at the front ends and at the rear ends, and a transverse settling-drum placed in the plane of the circulating-tubes with its axis intersecting the axes of said tubes, to which it is connected above and below; substantially as described.

2. A water-tube boiler having a bank of parallel inclined tubes, one or more steam and water drums above the tubes, into the front end of which the feed-water is supplied, headers connecting the tubes at the front and rear ends and themselves connected by circulating-tubes with the steam and water drum or drums at the front and rear ends, and a transverse settling-drum placed in the plane of the circulating-tubes with its axis intersecting the axes of said tubes, to which it is connected above and below; substantially as described.

3. A water-tube boiler, having a bank of parallel inclined tubes, one or. more steam and water drums above the tubes, headers connecting the tubes at the front and rear ends and themselves connected by circulating-tubes with the steam and water drum or drums at the front ends and the rear ends, and a transverse settling-drum placed in the plane of the circulating-tubes with its axis intersecting the axes of said tubes, to which it is connected above and below, the velocity l of circulation in said drum being less than the velocity of circulation at any other point; substantially as described.

4. A water-tube boiler, having a bank of parallel inclined tubes, one or more steam and water drums above the tubes, headers ends and themselves connected with the steam and water drum or drums at the front end and by circulating-tubes at the rear ends, and a transverse settling-drum connected with the circulating-tubes above and below, said settling-drum having an upper transverse deflecting plate or partition and a lower transverse deflecting plate or partition for controlling the direction of the flow of water through the drum; substantially as described.

5. A water-tube boiler having a settlingdrum provided with a deflecting plate or partition extending in a substantially circumferential direction along the inner circumference of the drum, and leading to a tube or tubes through which the water in the boiler circulates; substantially as described.

6. A water-tube boiler having a settlingdrum provided with deflecting plates or partitions extending along the inner circumference of the drum and leading respectively from and to an inlet and outlet for the water in. circulation; substantially as described.

7. A water-tube boiler having a settlingdrum provided with deflecting plates or partitions extending along the inner circumference of the drum, and leading respectively from and to an inlet and outlet for the water in circulation, said plates or partitions extending in opposite directions; substantially as described.

8. A water-tube boiler having a settlingdrum provided with a deflecting plate or partition extending along the inner circumference of the drum, and leading to a tube or tubes through which the Water in the boiler circulates, and being movable to afford access to said tube or tubes substantially as described.

9. A water-tube boiler with an upper transverse deflecting plate or partition and a lower transverse deflecting plate or partition for controlling the direction of the flow of water through the drum, the upper one being removable and the lower one having a removable cover for access to the tubes entering and leaving the drum; substantially as described.

parallel inclined tubes, one or more steam and Water drums above the tubes, headers connecting the tubes at the front and rear ends and themselves connected with the steam and water drum or drums by nipples at the front end and by circulating-tubes at the rear ends, and a transverse settling-drum placed in the plane of the circulating-tubes connecting the tubes at the front and rear 10. A water-tube boiler, having a bank ofwith its axis intersecting the axes of said tubes, to which it is connected above and below, said settling-drum having an upper transverse deflectin plate or partition and a lower transverse deflecting plate or partition for controlling the direction of the flow of water through the drum, the upper one being removable and the lower one having a removable cover for access to the tubes entering and leaving the drum, said settling-drum constituting the sole water connection betweenthe rear ends of the steam and water drum or drums and the rear headers, whereby the whole body of water in circulation passes through the settling-drum before reaching the tubes, and said settling-drum being of sufficient capacity to greatly reduce the velocity of the water passing therethrough below the velocity of circulation in any other part of the boiler so that the impurities contained in the water may settle out and be removed; substantially as described.

11. A'Water-tube boiler, having a bank of parallel inclined tubes, one or more steam and Water drums above the tubes, headers connecting the tubes at the front and rear ends and themselves connected with the steam and Water drum or drums by nipples at the front ends and by circulatin -tubes at the rear ends, and a transverse sett ing-drum placed in the plane of the circulating-tubes with its axis intersecting the axes of said tubes, to which it is connected above and be low, and adapted to restrict the area of open ing for the discharge of the products of combustion into the flue to that requiredfor properly s reading and distributing these roducts of combustion, whereby the Whole 1eat ing-surface of the boiler becomes efiicient for the abstraction of heat; substantially as de scribed.

In testimony whereof I have hereunto set my hand.

GEORGE H. BARRUS.

Witnesses:

J. E. DAVIS, W. 0. BROWN. 

